Collaborative Research: Physical processes in formation and breakdown of hypoxia in a tropical bay

合作研究：热带海湾缺氧形成和分解的物理过程

• 批准号: 1924220
• 负责人: Rachel Collin
• 金额: $ 15.2万
• 依托单位: Smithsonian Institution
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-10-01 至 2024-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1924220&HistoricalAwards=false
• 关键词: Collaborative; Research; Physical; processes; formation

This project is to study hypoxia in a tropical embayment in Panama (Bahia del Amirante) using a combination of ongoing monitoring data, new observations, and a numerical model. The project will focus on physical processes unique to tropical systems. Hypoxia, whereby marine waters become severely depleted in oxygen content, is a widespread deleterious anthropogenic influence on estuarine and coastal waters and is increasing in coastal regions globally. Hypoxia in tropical marine systems is poorly understood and understudied, despite the important implications for tropical ecosystems which sustain important fisheries habitats and coastal biodiversity. The project will include a field campaign to observe the physical and chemical parameters of the Bay as well as a modeling component to simulate the dynamic and biogeochemical responses and interpret the observational data. The project is expected to provide new understanding of the dynamics that initiate and control hypoxia in tropical systems. The results of this project will be disseminated through presentations at scientific meetings, seminars at universities, public talks, websites, and peer-reviewed journal articles. Communication of results to the broader scientific community will include a workshop on "Understanding hypoxia in the Caribbean" to be held in Panama in the third year of the grant. This workshop will bring together researchers from throughout the Caribbean working on diverse hypoxic systems with local Panamanian researchers and other stakeholders.This project includes an observational campaign and numerical simulations that will address the dynamics of hypoxia in shallow tropical systems. Physical and chemical measurements are designed to identify the important physical processes throughout the evolution of a seasonal hypoxic event in the Bay. Bahia Almirante is a tropical embayment in the Bocas del Toro region of Panama that has experienced repeated, seasonal hypoxia resulting in widespread bleaching and mortality of corals and other invertebrates. A fully-coupled physical biogeochemical model will be developed for the bay to test the dynamical understanding. The project will also leverage a historical record of weekly observations (temperature, salinity and oxygen) by the Smithsonian Tropical Research Institute (STRI) since 2010 to give historical context to our observations and to provide validation for the simulations. The physical processes regulating the ventilation of low-oxygen bottom waters in temperature coastal regions include inflow of fresh water and atmospheric fluxes, which affect density stratification, advection, and wind, wave, and tidal-driven turbulent mixing. A better understanding of the physical mechanisms and environmental conditions responsible for oxygen variability in tropical bays will yield rich insight into benthic ecology, turbulent mixing, larval connectivity, coastal hypoxia, ocean acidification and cross-shelf exchange of nutrients, pollutants, hypoxic waters.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

这个项目是研究巴拿马(巴伊亚德尔阿米兰特)的一个热带海湾的低氧，使用正在进行的监测数据、新的观测和数值模式的组合。该项目将侧重于热带系统特有的物理过程。缺氧是一种对河口和沿海水域的广泛有害的人为影响，在全球沿海地区正在增加，海水中的氧气含量严重枯竭。尽管低氧对维持重要渔业栖息地和沿海生物多样性的热带生态系统有重要影响，但对热带海洋系统的低氧了解很少，研究也不够。该项目将包括一项实地活动，以观察海湾的物理和化学参数，以及一个模拟动态和生物地球化学反应并解释观测数据的模拟部分。该项目预计将提供对热带系统中引发和控制缺氧的动力学的新理解。该项目的成果将通过在科学会议、大学研讨会、公开演讲、网站和同行评议的期刊文章中发表来传播。向更广泛的科学界通报成果将包括将于赠款的第三年在巴拿马举办的“了解加勒比地区的缺氧”讲习班。这次研讨会将汇聚加勒比各地致力于各种低氧系统的研究人员，以及巴拿马当地的研究人员和其他利益攸关方。该项目包括一个观测活动和数值模拟，将研究热带浅层系统中的低氧动态。物理和化学测量旨在确定海湾季节性低氧事件演变过程中的重要物理过程。巴伊亚·阿尔米兰特是巴拿马博卡斯德尔托罗地区的一个热带海湾，经历了反复的季节性缺氧，导致珊瑚和其他无脊椎动物普遍漂白和死亡。将为海湾开发一个完全耦合的物理生物地球化学模型，以检验动力学理解。该项目还将利用史密森热带研究所(STRI)自2010年以来每周观测(温度、盐度和氧气)的历史记录，为我们的观测提供历史背景，并为模拟提供验证。在温度较高的沿海地区，调节低氧底水通风的物理过程包括淡水的流入和大气通量，这些过程影响密度分层、平流、风、波和潮汐驱动的湍流混合。更好地了解导致热带海湾氧气变化的物理机制和环境条件将使人们对底栖生态、湍流混合、幼虫连通性、海岸缺氧、海洋酸化和营养物质、污染物、低氧水的跨陆架交换有丰富的见解。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Land Use and Land Cover Shape River Water Quality at a Continental Caribbean Land-Ocean Interface

土地利用和土地覆盖影响加勒比大陆陆地-海洋界面的河流水质

• DOI: 10.3389/frwa.2022.737920
• 发表时间: 2022
• 期刊: Frontiers in Water
• 影响因子: 2.9
• 作者: Clark, Kasey E.;Bravo, Viviana D.;Giddings, Sarah N.;Davis, Kristen A.;Pawlak, Geno;Torres, Mark A.;Adelson, Anne E.;César-Ávila, Carolina I.;Boza, Ximena;Collin, Rachel
• 通讯作者: Collin, Rachel

Seasonal hypoxia and temperature inversions in a tropical bay

• DOI: 10.1002/lno.12196
• 发表时间: 2022-08-03
• 期刊: LIMNOLOGY AND OCEANOGRAPHY
• 影响因子: 4.5
• 作者: Adelson, Anne E.;Altieri, Andrew H.;Pawlak, Geno
• 通讯作者: Pawlak, Geno